The purpose of this study is to investigate the causes of school violence against teachers based on the views of teachers. This study using mixed model was carried out in the spring term of 2015-2016 academic year with the participation of 604 teachers from 25 high school teachers working in central district of Niğde city. The data of this study was collected through a questionnaire which is made up of 5 sections. The participants were asked how big of a problem that teacher victimization is, how much they worry about their safety at school, what they think the possible reasons for the violence are, how they react in case of violence and what factors may increase teacher victimization. According to the quantitative results of the research, it is found that teachers who faced violence think teacher victimization is a much bigger problem and more worried about their safety at school than those who never faced violence. According to the qualitative results of the survey, the factors affecting the increase of teachers victimization were classified under the themes as a. institutionalrelated, b. education system-related, c. social, d. individual, e. teacher-related and f. media, & internet